Bunch of UI Changes for a better user experience.

Hey guys,

I checked out the HackTheNorth iOS app on GitHub and noticed that it didn't have a nice user experience. So I decided to tweak some of the UI, (TableViews instead of UIViewControllers if you USE a tableView..) and a bunch more fixes for the launch gear to resize according to the device size (3.5 inch, 4 inch, and possibly larger screen size for the new iPhone). I added the "Filter Search" into the tableView (no more tapping button and displaying it). Made a couple changes such that the Navigation bar hides when scrolling, better viewing for smaller screens. Anyway, there a bunch more stuff I added/changed too. Give it a try/test. I made sure I didn't touch any data objects. I only changed the UI.